rebuild ext. project if makefile changes
rebuild ext. project if makefile changes

Change-Id: Ib1b7dab5b4fa10f068bcce58e00450895c455121

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core